Acetylcholinesterase Biosensors for Electrochemical Detection of Organophosphorus Compounds: A Review

Table 6

AChE biosensor using quantum dots as immobilization support.

Mode of detection	Transducer	Enzyme immobilization method	Minimum detection limit	Linearity	Substrate/enzyme inhibitor	Time of incubation; (min)	Storage stability; (days)	Reference
Electrochemical	AuNPs-SiSG/GCE	Hydrogen Bonding	0.44 μM	NR	Monocrotophos	10	30	[73]
Amperometric	CdTe QDs/AuNPs/CHIT/GCE	Covalent Bonding	1.34 μM	4.4 × 10^−3–4.48 and 8.96–67.20 μM	Monocrotophos	8	30	[89]
Optical	CdTe-QDs/Glass	Electrostatic interaction	1.05 × 10^−5 and 4.47 × 10^−6 μM	1.0 × 10^−6–1.0 and 1.0–0.1 μM	Paraoxon; Parathion	15	35	[90]
Fluorescence quenching	Mn: ZnSe d-dots	NR	1.31 × 10^−11 mol	4.84 × 10^−11 to 4.84 × 10^−6 mol/L	Paraoxon	10	NR	[91]
Amperometric	CdTE QDs/Au electrode	Covalent Bonding	2.98 × 10^−3 μM	4.96 × 10^−3–2.48 μM	Carbyl	10	30	[92]

Note: NR: not reported.